" While there are 40-round magazines out ther"
There are reliable 60 and 100 round magazines out there. Surefire makes them. The 60 is the same length as a 30 and as wide as 2 30's clipped together.
Many LEO's are gun people but some are not. I was at my girlfriend 's Dad's over the holidays and her Dad and Stepmother are both cops in Chicago's south burbs. Her Dad is kind of a gun guy and had a Colt compact .45 on the counter. We started talking guns when Stepmother came in and almost seemed scared to see the gun out and being handled. She is also the cop that told my gal that radar detectors are illegal in Illinois? LOL